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This document summarizes information relevent to planning, execution, and interpretation of results from a study of the interaction of
sound in the 2-30Hz band with deep ocean seafloor using sea-surface sources, seafloor receivers, and borehole seismometers emplaced
by wireline re-entry at Deep Sea Drilling Project sites 417 and 418 in the western North Atlantic. We summarize published scientific
results from borehole sampling of water, sediment, and rock, from wire line logging, and from borehole seismic experiments. We present
new results from analysis of total power recorded by receivers clamped in basement during the borehole seismic experiment on DSDP
Leg 102. We document non-drilling investigations of the site and the nature and location of re-entry cones and transponders. We describe
the physical oceanography of the region and the speed of sound in water. We provide an extensive bibliography on published results from
scientific investigations at 417/418. This document was completed prior to 1989 surveys of sites 417 and 418.

The Seafloor Borehole Array Seismic System (SEABASS) has been developed to
measure the pressure and three dimensional particle velocity of the VLF sound field (2-50HZ)
below the seafloor in the deep ocean (water depths ...

Altered volcanic rocks were cored from over 350 m below the seafloor at the Papua New Guinea-Australia-Canada Manus Basin Hydrothermal Field (PACMANUS) deep-sea hydrothermal field, in the eastern Manus back arc basin. Fluid ...

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